Last night a woman reported on TV that her tires were only 2 days old and blown out. Gee she hit a pot hole the size football field and only yea only 6" + deep Nothing is built worth a dam any more in the old days you had blow outs especially recaps but today this is just what the companies want spend more money on our junk. Hurry buy our junk its no good after 4 years and dummies all go and buy it. Should we all change timing belts after 4 years?. Companies need to be accountable and they are not at this time Remember the Firestone steel radial 500s? again finally made to pay. Trailer tires forget it they are all crap. One last thing check your tires once a week for pressure etc it will help in the long run